1 /* 2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. 4 * 5 * This copyrighted material is made available to anyone wishing to use, 6 * modify, copy, or redistribute it subject to the terms and conditions 7 * of the GNU General Public License version 2. 8 */ 9 10 #include <linux/slab.h> 11 #include <linux/spinlock.h> 12 #include <linux/completion.h> 13 #include <linux/buffer_head.h> 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/gfs2_ondisk.h> 17 #include <linux/lm_interface.h> 18 #include <asm/atomic.h> 19 20 #include "gfs2.h" 21 #include "incore.h" 22 #include "ops_fstype.h" 23 #include "sys.h" 24 #include "util.h" 25 #include "glock.h" 26 27 static void gfs2_init_inode_once(void *foo, struct kmem_cache *cachep, unsigned long flags) 28 { 29 struct gfs2_inode *ip = foo; 30 if (flags & SLAB_CTOR_CONSTRUCTOR) { 31 inode_init_once(&ip->i_inode); 32 spin_lock_init(&ip->i_spin); 33 init_rwsem(&ip->i_rw_mutex); 34 memset(ip->i_cache, 0, sizeof(ip->i_cache)); 35 } 36 } 37 38 static void gfs2_init_glock_once(void *foo, struct kmem_cache *cachep, unsigned long flags) 39 { 40 struct gfs2_glock *gl = foo; 41 if (flags & SLAB_CTOR_CONSTRUCTOR) { 42 INIT_HLIST_NODE(&gl->gl_list); 43 spin_lock_init(&gl->gl_spin); 44 INIT_LIST_HEAD(&gl->gl_holders); 45 INIT_LIST_HEAD(&gl->gl_waiters1); 46 INIT_LIST_HEAD(&gl->gl_waiters2); 47 INIT_LIST_HEAD(&gl->gl_waiters3); 48 gl->gl_lvb = NULL; 49 atomic_set(&gl->gl_lvb_count, 0); 50 INIT_LIST_HEAD(&gl->gl_reclaim); 51 INIT_LIST_HEAD(&gl->gl_ail_list); 52 atomic_set(&gl->gl_ail_count, 0); 53 } 54 } 55 56 /** 57 * init_gfs2_fs - Register GFS2 as a filesystem 58 * 59 * Returns: 0 on success, error code on failure 60 */ 61 62 static int __init init_gfs2_fs(void) 63 { 64 int error; 65 66 error = gfs2_sys_init(); 67 if (error) 68 return error; 69 70 error = gfs2_glock_init(); 71 if (error) 72 goto fail; 73 74 error = -ENOMEM; 75 gfs2_glock_cachep = kmem_cache_create("gfs2_glock", 76 sizeof(struct gfs2_glock), 77 0, 0, 78 gfs2_init_glock_once, NULL); 79 if (!gfs2_glock_cachep) 80 goto fail; 81 82 gfs2_inode_cachep = kmem_cache_create("gfs2_inode", 83 sizeof(struct gfs2_inode), 84 0, SLAB_RECLAIM_ACCOUNT| 85 SLAB_MEM_SPREAD, 86 gfs2_init_inode_once, NULL); 87 if (!gfs2_inode_cachep) 88 goto fail; 89 90 gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", 91 sizeof(struct gfs2_bufdata), 92 0, 0, NULL, NULL); 93 if (!gfs2_bufdata_cachep) 94 goto fail; 95 96 error = register_filesystem(&gfs2_fs_type); 97 if (error) 98 goto fail; 99 100 error = register_filesystem(&gfs2meta_fs_type); 101 if (error) 102 goto fail_unregister; 103 104 printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); 105 106 return 0; 107 108 fail_unregister: 109 unregister_filesystem(&gfs2_fs_type); 110 fail: 111 if (gfs2_bufdata_cachep) 112 kmem_cache_destroy(gfs2_bufdata_cachep); 113 114 if (gfs2_inode_cachep) 115 kmem_cache_destroy(gfs2_inode_cachep); 116 117 if (gfs2_glock_cachep) 118 kmem_cache_destroy(gfs2_glock_cachep); 119 120 gfs2_sys_uninit(); 121 return error; 122 } 123 124 /** 125 * exit_gfs2_fs - Unregister the file system 126 * 127 */ 128 129 static void __exit exit_gfs2_fs(void) 130 { 131 unregister_filesystem(&gfs2_fs_type); 132 unregister_filesystem(&gfs2meta_fs_type); 133 134 kmem_cache_destroy(gfs2_bufdata_cachep); 135 kmem_cache_destroy(gfs2_inode_cachep); 136 kmem_cache_destroy(gfs2_glock_cachep); 137 138 gfs2_sys_uninit(); 139 } 140 141 MODULE_DESCRIPTION("Global File System"); 142 MODULE_AUTHOR("Red Hat, Inc."); 143 MODULE_LICENSE("GPL"); 144 145 module_init(init_gfs2_fs); 146 module_exit(exit_gfs2_fs); 147 148